Improved roofing-compound



33mm Qttfia,

DWIGHT HITCHCOCK, OF SYRACUSE, NEW YORK.

Letters Patent No. 84,120,

dated November 17, 1868.

IMPROVED ROOFING-COMPOUND.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern.-

Be it known that I, DWIGHT HITCHCOCK, of Syracuse, in the county ofOnondaga, and State of New York, have invented a new and usefulImprovement in Roofing-Compound; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable those skilled in the art to make and use the same.

The following is a list of the ingredientsused, and

their relative proportions:

Oalcareous tufa, two parts.

Marl, two parts.

Sand, one part.

Goal-tar, three parts.

These ingredients are boiled together for six hours, the mixture beingconstantly agitated, and at the end of this time the preparation isready for use.

After some months have elapsed, and the compound has had time to set orbecome seasoned, the affinity among the several ingredients is such thatit becomes A roofing-compound, composed of the within ingredients, inabout the proportions mentioned.

The above specification of my invention signed by me, this 28th day ofSeptember, 1868 DWIGHT HITOHGOGK. YVitnesses:

WM. J, DODGE, F. A. MORLEY.

